Sewing-machine.



W. .0. FREE.

SEWING MACHINE.

7 APPLICATION FILED APB.16, 1912.

\1 I Patented May 26; M1913.

' justment on-its-pivo WILLIAM G. FREE, or oI-IIcAGo, ILLINOIS.

SEWING-MACHEINE.

Specification of Letters Patent.

- Patented'May 20,1913.

Application filed April 16 1912. Serial No. 691,160.

To all whom it'mag concem:

Be it known that I,--WII .LIAM G. FREE,

a citizen of the United States, residing at Chicago, in'thecounty of Cook and State of 5 Illinois, have invented a certain new and useful Improvement in Sewing-Machines, of which the following isa specification.

. My invention relates more particularly to a mechanism for driving the shuttle and carrier of an oscillating shuttle sewing machine. In order to reduce the noise and the e-fiort necessary to run machines of this type it is recognized that the number and movement of inertia of the oscillating parts v should be reduced to a minimum. In certain patents heretofore granted to me of which that numbered 830,059 and granted September 4, l906'is an example, I have-disclosed a shuttle motion in which all but one of the parts are rotary, the exception being the oscillating head upon which the shuttle carrier and shuttle are mounted. This head,in addition to the arm carrying the shuttle carrier, comprises a yoke in which a gimbal ring is pivoted, which latter co- 3 operates with a cam face on the lower shaft, through which movement is communicated to the oscillating head in a manner that will be apparent from an inspection of the drawing ofthe patent.- The construction of this device however, is such that careful adjust-'- ment and alinement of the parts are necessary, which not only inereases the original cost of the machine but ,adds to the expense of keepingit in repair. g

. My presentinvention maybe said to be an improvemen't'upon. the shuttle mechanism of my former patents and of the prior .'art,' especially in that the weight of the oscillat- 40 ing parts is greatly reduced and'the accuracy of adjustment required inthe former mechanism is obviated. i, I j I In the device of the present application the oscillatinghead carrying the shuttle is i not mounted on the head plate of the machine as in the mechanism heretofore described,- though it is pivotally connected thereto, o'r moreaccuratelys eaking, guided thereon, but with-some free din-of axial ad t It is suspended from I or supported on tida -shaft with which it is I connected "by a sleeve mounted. upon an in clined' portion t-iiereof, the sleevebeing in I turn pivoted or trunnioned in a yoke'formed "i e s e th va -"Et amount-of axial adjustment is alsopermitted between the-trunnions of the sleeve and the yoke upon the oscillating head, and by reason of this freedom of movement with respect both to the pivot upon the head plate, and the trunnions upon the sleeve, the oscillating head may be said to float or be suspended from the lower shaft. No accurate adjustment and alinement of the parts is therefore necessary to secure easy running qualities in the machine and as a result the machine is not only easier to assemble and cheaper to construct, but the size of the bearings and parts can be and is reduced to a minimum.

An embodiment of my invention is shown in. the accompanying'drawings and specifically described in the following specification, but it is to be understood that the specific disclosure is 'for the purpose of exemplification only and that my invention is not limited thereto but its scope is defined I in the following claims.

In the drawings-Figure 1 is a vertical ele vation partly in section of a sewing machinehead embodying my 'inventionyFig. 2 is a bottom plan view of the same andFig. 3 is a detail in perspective upon a slightly enlarged scale.

. The stationary arm A, needle bar B, up.- .per shaft C, hand wheel j D,- pulley E and lover F may be and as shown. are, of usual construction, the latter element having asliding fulcrum G and a roller H which 0 operates in a radialway I; formed between two lugs of a disk K upon the rear end-of the lower shaft. By reason, of the fact that all these parts areof known construction and do not specifically enter into my invention, it is unnecessary to describe them further-The head plate L is perforated at M'for the passage of the lever F and is formed with a bracket N ':which forms a bearing for the lower shaft. At its forward end the hea plate is formed with a pair of downwardlyprojecting posts 0, O

upon which is mounted and secured a bridge piece P, havinga perforatedicentral boss R which forms a bearing for the forward end of the lower shaft. The lower shaft T is;

provided, intermediate the disk K and the rear-bearing, with a'cam U and at'itsforward-end just outside the .hearin'glR with an additional cam V, the two cams -=being em bmoedor spanned respectivelybyltheforins 55 parts and therefore accurate placement and of bifurcated levers W, X, each of which connects at one end with an arm Y, Z the. rock shaft a. The latter lever'car'ries the cloth feed plate I) and'receives a reciprocat- ,ing horizontal motion from the rock shaft and a vertical motion from the cam V on.

the front of the lower shaft. This feed mechanism is of a substantially familiar form to'those skilled in the art and forms no part'of my present invention and need therefore notbe further described. The oscillating head 0 is pivoted to the under face .of-the sewing machine headfplate L a d is formed with an integral arm d, to w ich the shuttle carrier e is secured hya screw f. The oscillating headcomprises, in

addition to the arm- 03 before referred to, a hub g which is centrally bored to receive a The stud h is mounted in the machine head plate directly above the center of the lower; shaft T and the latter is formed in line with the stud with a reduced inclined portion Z,

indicated in dotted lines in 'Fig. 3, connected at opposite ends to the end sections of the 1 shaft by the crank arms m, n. ,The center- For convenience of assembling this sleeve is of the inclined portion of the shaft is sub-' ,stantially inthe axis of the stud h and the hub g of the oscillating head and the inclined reduced portion of the shaft forms a bearing for a sleeve 0. fitted between theshoulders p and (7 upon the crank arms.

formed in two sections secured together by screws 7*, 1", and each section bears a trun-" nion s, the pair of ,trunnions being in' alinement and received within bearingeyes t, t, formed in the branches of'a yoke u extending upwardly from and integral with the A hubo'f the oscillating. head. The trunnions are perpendicular to the inclined portion of the shaft and are permitted slight axial movement with relation to their bearings.

This axial play together with the axial play between the oscillating head and the stud on which it ,ispivoted, permits a substantially universal adjustment between the alining, of the v rious elements are not necessary as 1n m former device. Furthermore, I am here enabled to dispense with any large bearing surfaces or bearings, the stud h on the head plateacting substantially only as a guide or journal to hold the head to a pivotal oscillating @movement. The weight of the parts, and especially of such as'have an oscillating motion has been the prior art.

greatly reduced and the-whole construction simplified as compared to the devicesof It will be apparent from what ha's been said that when rotary motion. is given the -lower shaft by the familiar mechanism .heretofore. referred to, thesleeveupon the inclined portion of the shaft is given a Wabbling motion about the intersection of the axes of its trunnions and .the shaft, and

motion to the oscillating head and shuttle carrier, sothat the shuttle isfed back and 'forth along the shuttle, race- 4w.

In the foregoing specification I have re- -the trunnions oscillate back and forth in'a horizontal plane and impart a swinglng' ferred to the shaft T as rotaryand ordinarily as 1n the particular-device described the shaft will be given [a continuous rota-'- tion in one direction. It. will be obvious, however, that the shaft might be given rotation in alternate directions, or inother words oscillation without the scope of my invention.

I claim:

departing from hearing thereon, a member journaled on the bearing and an oscillating shuttle carrier pivotally connected to said member.

2. Ina sewing machine, a shuttle mechae nism comprising a rotary shaft,a n lnchned" bearing thereon, a member mounted on-the 1. In a sewing mach1ne,;a shuttlemechaa msm comprising a, rotary shaft, anmclmed hearing, an oscillating head pivoted to'and supported -by said member and a vertical arbor'a'bout which. said shuttle carrier oscillates. I

3.- In a sewingmachine, ashuttle operatingmechanism comprising a rotary shafthavmg an inclined bearmg, a member sleeved upon the bearing, a shuttle carrier' pivotally connected to the sewingmachine head'plate on an. axis transverse to the shaft and .pivotal connection'between the sleeved member and said-shuttle carrier.

.4 4. .In 'a shuttleoperat ng mechanism, a.

shaft having a bearing thereon inclined to the axisofthe shaft, a sleeve on the bearing, an-oscillating head carrying a shuttle carrier and pivoted onthe head plate on an -axis transverse to.the shaftand a pivotal connection between the sleeved; member andt-heoscillating head, the axis of the connection bein 4 transverse to the bearing -on the shaft an also to the axis on whichthe oscil lating head is pivoted.

. 5.. In a shuttle operating mechanism for a sewing machine, an oscillating head pivot,-

ally' guided upon theheadplateof the machine and having capacity for axial-move- -ment with relationto its pivot, a rotary' shaft arranged substantially at right angles 1 tot-he axis ofjthe oscillating head, an inclined bearing on the shaft, amember sleeved upon the bearing and pivoted to .the oscillating head, there being provision for axial move- I sewingmachine, a rotary shaft having an incllned bearlngthereon, a sleeve on the bearing having transverse trunnions, an os- 'cillating head with a shuttle-carrier mounted thereon, said head pivoted on the sewing machine head plate and formedwith a yoke and bearings on the yoke engaging-the trunnions on the sleeve.

-7. In a shuttle operating mechanism for sewing machines, arotary shaft having arr inclined bearing, amember sleeved upon said bearing, an oscillating'head carrying the shuttle carrier and having vertical pivotal connection with the sewing machine shaft and having head plate and pivoted to the v 20 axis transverse thereof. a

8. In a shuttle operating mechanism for a'sewmg mach1ne,- a rotary shaft having an inclined bearing portion, an oscillatin head.-

havingthe shuttle-carrier moimted t Qe'reon:

and pivoted to'the head plate transversely of the. rotary shaft, a yoke formed upon "the oscillating head and having bearings at the ends of the arms thereo mounted upon the inclined bearing. on the trunnions engaging the bearings of the yoke.

' WILLIAM 0.. FREE.

witnesses'z' JOHN'B. MAcAULnY, ROBERT DoBBERMAri.

a split 1 sleeve 

